10 terms

Science Chapter 8 Vocabulary

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seismology
the study of earthquakes
deformation
the bending, tilting and breaking of the Earth's crust; the change in the shape of rock in response to stress
elastic rebound
the sudden return of elastically deformed rock to its undeformed shape
seismic waves
a wave of energy that travels through the Earthy, away from an earthquake in all directions
P waves
a seismic wave that causes particles of rock to move in a back-and-forth direction
S waves
a seismic wave that causes particles of rock to move in a side-to-side direction
seismograph
an instrument that records vibrations in the ground and determines the location and strength of an earthquake
seismogram
a tracing of earthquake motion that is created by a seismograph
epicenter
the point on Earth's surface directly above an earthquake's starting point, or focus
focus
the point along a fault at which the first motion of an earthquake occurs